public void DemoContent_ReturnEmptyResult_ShouldReturnEmptyResult(Db db,
                                                                   [Greedy] DemoController demoController, [Content] ID itemId)
 {
     using (RenderingContext.EnterContext(new Rendering(), db.GetItem(itemId)))
     {
         demoController.ReturnEmptyResult().As <ActionResult>().Should().BeOfType <EmptyResult>();
     }
 }